About 18 liters of under-seat storage.
In practice, that storage space is designed to hold a full-face helmet along with a few personal items, with the exact figure depending on the market and model year. For precise numbers, consult the official spec sheet or the owner's manual for your region.
Practical use of the 18-liter compartment
Riders typically use the space for a full-face helmet and small essentials such as gloves, documents, and a rain jacket. The seat opening and interior shape influence how comfortably you can fit items, so real-world fit may vary by helmet size and cargo you carry.
What fits inside
In everyday commuting, most riders find that a standard full-face helmet fits into the 18-liter compartment, with room left for small items like a phone, wallet, charger, and documents. If you carry a larger or modular helmet, you may need to rearrange items or consider external storage.
Market variations and how to verify
The 18-liter figure is common, but capacities can differ by country, year, and seat design. Some markets list 16–17 liters or slightly different measurements. To be certain, check the spec sheet for your bike's region or ask a local Honda dealer.
Additional storage options
For extra capacity beyond the under-seat space, riders often add a top box or pannier bags. Honda offers official accessories like a top box and mounting rack to complement the Click 125i without compromising seat access.
Summary
The Honda Click 125i generally offers around 18 liters of under-seat storage, enough for a helmet and several small items. Variations by market and model year mean you should verify the exact spec for your bike, and consider optional accessories if you need more space.